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LONG-TERM DEBT (Tables) | 9 Months Ended
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Sep. 30, 2019
Debt And Derivatives Disclosure [Abstract] |
Summary of Long-term Debt and Finance Leases by Debt Instrument | A summary of long-term debt and finance leases by debt instrument follows:
| September 30, 2019 |  | December 31, 2018
Senior Secured Credit Facility: |  |  |
Revolving line of credit facility ("Revolving Credit Facility") due May 2023; bearing interest at LIBOR plus 1.75% | $ | 43,400 |  |  | $ | 69,600 |
Term loan A facility ("Term Loan Facility") due May 2023; bearing interest at LIBOR plus 1.75% | 350,000 |  |  | 350,000 |
Tax-Exempt Bonds: |  |  |
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014 ("New York Bonds 2014") due December 2044 - fixed rate interest period through 2019; bearing interest at 3.75% | 25,000 |  |  | 25,000 |
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014R-2 ("New York Bonds 2014R-2") due December 2044 - fixed rate interest period through 2026; bearing interest at 3.125% | 15,000 |  |  | 15,000 |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-3 ("FAME Bonds 2005R-3") due January 2025 - fixed rate interest period through 2025; bearing interest at 5.25% | 25,000 |  |  | 25,000 |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-1 ("FAME Bonds 2015R-1") due August 2035 - fixed rate interest period through 2025; bearing interest at 5.125% | 15,000 |  |  | 15,000 |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-2 ("FAME Bonds 2015R-2") due August 2035 - fixed rate interest period through 2025; bearing interest at 4.375% | 15,000 |  |  | 15,000 |
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013 ("Vermont Bonds") due April 2036 - fixed rate interest period through 2028; bearing interest at 4.625% | 16,000 |  |  | 16,000 |
Business Finance Authority of the State of New Hampshire Solid Waste Disposal Revenue Bonds Series 2013 ("New Hampshire Bonds") due April 2029 - fixed rate interest period through September 2019; bore interest at 4.00% | 11,000 |  |  | 11,000 |
Other: |  |  |
Finance leases maturing through December 2107; bearing interest at a weighted average of 5.2% | 16,510 |  |  | 11,248 |
Notes payable maturing through June 2027; bearing interest at a weighted average of 3.5% | 4,862 |  |  | 2,401 |
Principal amount of long-term debt and finance leases | 536,772 |  |  | 555,249 |
Less—unamortized debt issuance costs (1) | 9,226 |  |  | 10,950 |
Long-term debt and finance leases less unamortized debt issuance costs | 527,546 |  |  | 544,299 |
Less—current maturities of long-term debt and finance leases | 3,571 |  |  | 2,298 |
| $ | 523,975 |  |  | $ | 542,001 |
(1)A summary of unamortized debt issuance costs by debt instrument follows:
| September 30, 2019 |  | December 31, 2018
Revolving Credit Facility and Term Loan Facility (collectively, the "Credit Facility") | $ | 5,889 |  |  | $ | 7,118 |
New York Bonds 2014 | 707 |  |  | 847 |
New York Bonds 2014R-2 | 405 |  |  | 450 |
FAME Bonds 2005R-3 | 453 |  |  | 517 |
FAME Bonds 2015R-1 | 569 |  |  | 622 |
FAME Bonds 2015R-2 | 436 |  |  | 493 |
Vermont Bonds | 554 |  |  | 595 |
New Hampshire Bonds | 213 |  |  | 308 |
| $ | 9,226 |  |  | $ | 10,950 |
Summary of Cash Flow Hedges | A summary of the effect of cash flow hedges related to derivative instruments on the consolidated balance sheet follows:
|  |  | Fair Value |  |
| Balance Sheet Location |  | September 30, 2019 |  | December 31, 2018
Interest rate swaps | Other current assets |  |  | $ | — |  |  | $ | 338 |
Interest rate swaps | Other non-current assets |  |  | — |  |  | 482 |
|  |  | $ | — |  |  | $ | 820 |
Interest rate swaps | Other accrued liabilities |  |  | $ | 1,686 |  |  | $ | 387 |
Interest rate swaps | Other long-term liabilities |  |  | 4,398 |  |  | 1,555 |
|  |  | $ | 6,084 |  |  | $ | 1,942 |
Interest rate swaps | Accumulated other comprehensive loss |  |  | $ | (6,459) |  |  | $ | (1,196) |
Interest rate swaps - tax provision | Accumulated other comprehensive loss |  |  | (112) |  |  | (112) |
|  |  | $ | (6,571) |  |  | $ | (1,308) |
A summary of the amount of expense on cash flow hedging relationships related to interest rate swaps reclassified from accumulated other comprehensive income (loss) into earnings follows:
|  | Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
|  | 2019 |  | 2018 |  | 2019 |  | 2018
Statement of Operations Location |  | (Expense) Income |  |  |  |  | (Expense) Income |  |  |
Interest expense |  | $ | (147) |  |  | $ | (156) |  |  | $ | (216) |  |  | $ | (247) |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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